Chirality density wave of the 'hidden order' phase in URu${}_2$Si${}_2$

Abstract

A second-order phase transition is associated with emergence of an "order parameter" and a spontaneous symmetry breaking. For the heavy fermion superconductor URu${}_2$Si${}_2$, the symmetry of the order parameter associated with its ordered phase below 17.5 K has remained ambiguous despite 30 years of research, and hence is called "hidden order" (HO). Here we use polarization resolved Raman spectroscopy to specify the symmetry of the low energy excitations above and below the HO transition. These excitations involve transitions between interacting heavy uranium 5f orbitals, responsible for the broken symmetry in the HO phase. From the symmetry analysis of the collective mode, we determine that the HO parameter breaks local vertical and diagonal reflection symmetries at the uranium sites, resulting in crystal field states with distinct chiral properties, which order to a commensurate chirality density wave ground state.

References in corpus (12)

• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2
• Gapped itinerant spin excitations account for missing entropy in the hidden order state of URu${}_2$Si${}_2$
• Emergent Rank-5 'Nematic' Order in URu2Si2
• Hastatic Order in URu2Si2
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• Observation of Multiple-Gap Structure in Hidden Order State of URu2Si2 from Optical Conductivity

Cited by in corpus (23)

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• Probing 5f-state configurations in URu2Si2 with U L3-edge resonant x-ray emission spectroscopy
• Analogy between the "Hidden Order" and the Orbital Antiferromagnetism in URu${}_{2-x}$Fe${}_x$Si${}_2$
• Hastatic Order in URu2Si2 : Hybridization with a Twist
• Theory of Scanning Tunneling Spectroscopy: from Kondo Impurities to Heavy Fermion Materials
• Pressure-Induced Rotational Symmetry Breaking in URu${}_2$Si${}_2$
• Raman spectroscopy of $f$-electron metals: an example of CeB${}_6$
• Singlet magnetism in intermetallic UGa${}_2$ unveiled by inelastic x-ray scattering
• Distinct magnetic spectra in the hidden order and antiferromagnetic phases in URu2-xFexSi2
• On the possibility to detect multipolar order in URu${}_2$Si${}_2$ by the electric quadrupolar transition of resonant elastic X-ray scattering
• Detailed optical spectroscopy of the hybridization gap and the hidden order transition in high quality URu${}_2$Si${}_2$ single crystals
• Thermodynamic Measurement of Angular Anisotropy at the Hidden Order Transition of URu${}_2$Si${}_2$
• Incommensurate chirality density wave transition in a hybrid molecular framework
• Origin of gap-like behaviors in URu${}_2$Si${}_2$: Combined study via quasiparticle scattering spectroscopy and resistivity measurements
• NMR Investigation of antiferromagnetism and coherence in URu${}_2$Si${}_{2-x}$P${}_x$
• Fe substitution in URu${}_2$Si${}_2$: singlet magnetism in an extended Doniach phase diagram
• Raman Active High Energy Excitations in URu${}_2$Si${}_2$
• Quasiparticle Relaxation Dynamics in URu${}_{2-x}$Fe${}_x$Si${}_2$ Single Crystals
• Chiral Electronic Excitations in a Quasi-2D Rashba System BiTeI
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering
• Proximity-induced hidden order transition in a correlated heterostructure Sr${}_2$VO${}_3$FeAs
• Entropy driven reverse-metal-to-insulator transition and delta-temperatural transports in metastable perovskites of correlated rare-earth nickelate